Kiln.



H. R. STRAIGHT.

MLN.l APPLICATION FILED SEPT. 25.1916.

Patented Apr. 23,1918.

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HQ H. STRAIGHT.

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vBeit' known that lQiI-fivitn if. Saiiziimii'r, a'citeiiof the United States,"sidingiat Adel, in the county oi Ual'laslandl'itatefof Iowa,V liaveunvented heu and useful `11npro'venie'nts linv 'Kilns of l which the Jfollowing' is a specification.

y My' invention relates 'tol iinprovenients "in kilns or ovens, "and lmre particularly to down draft kilns adapted to iisepiducer gas as fuel. l

The object l`oi" myI inventionis` 'tofsiinplify the Construction' of kilns o1* o'yenshnd 'tolincrease the efficiency thereof "by eliminating the use bi: bag orullash yvailstherMn.

Another object l "of "myt irivehtionfis 'to simpliiy they Ameans of ins'tallingla'pp'aratus for bui;'ning="`gas"i`n `dolyvn"draftf l ns.

` A; further obj ecti is" toiprovijde inoreiefective means for oonti'fliingthe'distribution of' heat in caseoffstorm `oriuieoiual loading of different parts of the kiln.

A further object is toeconon'iize Vspace by arranging l'ues and' othe "'accessoiiesibove the `kiln,` instead of Yat thefsidef thereof;` thereby accommodating a"larger nui'nb'ei" lof' kilns Within a given space. Y

A further 'object is to' utilizelshrter flues from the'soiu-Ce ofulglas supplyto'the point of combusti on and thus saveV heat unitsllniv lost by radiation. y y

in the dravvings,` `l-"igu're lis affragmentary central sectio'r'laly v`iew"`of"a`liln `e1nbodying my invention Fig." 2 is'gi. C letail'lplan rien" of the nozzlesV forming thegas' burners and the 'influents leading thereto gjFig. 3 is a :fragmentary bottom view of" the' samer; Fig. 4! is a detail sectional vieni taken Yonr th lilies ll-'l ot Fig. 15and'illustratesthefvalvein ona'otfvthe gas noiialesgand Fig. afpen speotiv e vieivin detail of '1n -gas iio'zz'lefa'nd air rio/"zie, andshows'themaniieiin'l Thi'ch said now/:les are' ass'einbledto form abuifner.

` Referring to the dra-"Win" l have lused the reifer-ence numeral 10 "t'fi' 7 i iraaua@ teuer thekilnand I11 the brownl'thereof. The base, which may be ofordinary construction, isomitted, The interior'of theki'lnisf'unobsti-noted by bag or flash Walls and is cap'able of receiving a maximum supply of Ware to be baked. By placing the producer gas main 12 and air supplyvpipe 13 above the crown of the kiln, I economize space and permit the grouping of a maximum number of kilns on a given area. Through the erown 1l of the kiln, ll form a plurality of A' the open these n'Zz avannf*sranienmjoFannnfioiira.

Kinn.

buter 16, and

`-gas Ioonduit f19 forms an #A1-e. if fili web@ ,ni @Manege faire nozzles' 'forni burners, \vh1ch` direct "the vcom- 'and outward'toward'the Wall otthekiln.

The proportion 1kiigas luifelfair-` issuing from theburnersumay be variedatfxvill'by regulatilrg :gate lvalves 21 i1 e 'airn'ozzles l5 zl'nd the' lsivinging vesQQI thelfga si noz-A juil' "othersA arein use. `This"iijsevgofmthe "v'lves is often advantageous for the reason )t be'ftlefiebted from" llt) constructed, I place in the openings 14 between the nozzles and the kiln crown l1 a collar 23 of non-heat conducting material, such as asbestos.

I provide for cleaning the kiln by burning out accumulations of carbon through the gas distributingfdrum18.-Said drum 18 has an opening 24 in the top thereof, .which is normally closed by a coverV 25. When the kiln is not in use, this cover may be removed and the drum will serve as a chimney through which soot and'other products of combustion may be burned out.

- Having described my invention, what I claim as new and desire to protect by Letters Patent, is: y

4l. A kiln, provided with a series of openings in the crown thereof fory the introductionv of gas and air,`in. combination with a gas drum above said crown, anvannular air distributer about the base of said drum, a seriesy of air nozzles leading from said distributer into the openings in the crown of said kiln, and a series of gas nozzles leading` from said ydrum and discharging within said air nozzles.

2. .A kiln, provided with openings in the crown thereof, in .combination with a gas distributing drum above the crown, an annular :air distributing conduit around said drum, a series of 'fiaring air nozzles leading from said conduit into the openings in the crown of vsaidpkiln, and a series of gas nozzlesfextending radially downward and outward from said drum and discharging within said'airnozzles., y y

.3. Al kiln,'providedwith a series of openings at the top of the crown, in combination with a plurality of burners', each consisting of an air nozzle and a gas 1nozzledischarging within saidair nozzle, said nozzles being arranged to direct air and gas obliquely downward toward the wall of the kiln, and controlling valves lin said nozzles.

4f. A down draft kiln, provided with a gas burner located in its crown, a radial gas distributer and an` annular air distributer located above the crown, and gas and air in- Y' lets leading respectively from said gas and air distributers to said burner.

5. In a down draft kiln, provided with a series of openings in the crown thereof for the introduction of gas and air, va series of burners arranged in a horizontal circle having nozzles directed obliquely toward the wall of the kiln and located within said openings, an air influent pipe and a gas i11- fiuent pipe leading to said burners.

6. IH a down draft kiln, provided with a series of openings in the Crown thereof for the introduction of gas and air, a series of burners arranged in a horizontal circle having nozzles directed obliquely toward the wall of the kiln and located within said openings, a gas infiuent pipe leading to said burners, and an air inliuent pipe communieating with said burners and discharging above said gas pipe.

7. In a down draft kiln, provided with a series of openings in the crown thereof for the introduction of gas and air, a series of burners having nozzles directed obliquely toward the wall of the kiln and located wilhin said openings, an air inliuent pipe and a gas influent pipe leading to said burners. 8. In a down draft kiln, provided with a series of openings in the crown thereof for the introduction of gas and air, a series of burners having nozzles directed obliquely toward the wall of the kiln and located within said openings, agas influent pipe leading to said burners, and an air influent pipe communicating with said burners and discharging above said gas pipe.

9. In a down draft kiln, provided with a series of openings in the crown thereof for the introduction of gas and air, a series of burners located within said openings, a gas infiuent pipe leading to said burners and an air influent pipe discharging into said burners above said gas pipe.

l0. In a down draft kiln, provided with a series of openings in the crown thereof for the introduction of gas and air, a series of burners located within said openings, air influent pipes communicating with each burner and discharging` at the inner part of said openings, and gas influent pipes projecting within and discharging immediately beneath said air influents. y 11. A kiln provided. with openings at the top of the crown, air nozzles extending` into said openings, a gas distributing drinn having an opening at the upper end thereof, a closure for said opening, and gas nozzles leading downward from said drum and discharging within said air nozzles.

VVhereof, I have hereunto subscribed my name to this specification.

HALVER R. STRAIGHT.

Copies of this patentmvay be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. C. 

